package com.jzg.jcptadmin.adpter;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.SectionIndexer;
import android.widget.TextView;

import com.jzg.jcptadmin.R;
import com.jzg.jcptadmin.data.vo.SourceData;

import java.util.List;

/**
 * Created by jzg on 2015/12/28.
 */
public class ChooseAdapter extends BaseAdapter implements SectionIndexer {
    private List<SourceData.TableEntity> list;
    private Context context;
    private ViewHolder viewHolder;

    public ChooseAdapter(Context context,List<SourceData.TableEntity> list){
        this.context = context;
        this.list = list;

    }

    public void UpData(List<SourceData.TableEntity> list){
        this.list = list;
    }
    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        if(convertView == null){
            viewHolder = new ViewHolder();
            convertView = View.inflate(context, R.layout.choose_item,null);
            viewHolder.tv_chooseitem = (TextView) convertView.findViewById(R.id.tv_chooseitem);
            viewHolder.tvLetter = (TextView) convertView.findViewById(R.id.catalog);
            convertView.setTag(viewHolder);
        }else{
            viewHolder = (ViewHolder) convertView.getTag();
        }
        // 根据position获取分类的首字母的Char ascii值
        int section = getSectionForPosition(position);

        // 如果当前位置等于该分类首字母的Char的位置 ，则认为是第一次出现
        if(position == getPositionForSection(section)) {
            viewHolder.tvLetter.setVisibility(View.VISIBLE);
            viewHolder.tvLetter.setText(list.get(position).getSortLetters());
        } else {
            viewHolder.tvLetter.setVisibility(View.GONE);
        }
        viewHolder.tv_chooseitem.setText(list.get(position).getName());

        return convertView;
    }

    /**
     * 根据ListView的当前位置获取分类的首字母的Char ascii值
     */
    public int getSectionForPosition(int position) {
        return list.get(position).getSortLetters().charAt(0);
    }

    /**
     * 根据分类的首字母的Char ascii值获取其第一次出现该首字母的位置
     */
    public int getPositionForSection(int section) {
        for (int i = 0; i < getCount(); i++) {
            String sortStr = list.get(i).getSortLetters();
            char firstChar = sortStr.toUpperCase().charAt(0);
            if(firstChar == section) {
                return i;
            }
        }

        return -1;
    }

    /**
     * 提取英文的首字母，非英文字母用#代替。
     *
     * @param str
     * @return
     */
    private String getAlpha(String str) {
        String sortStr = str.trim().substring(0, 1).toUpperCase();
        // 正则表达式，判断首字母是否是英文字母
        if(sortStr.matches("[A-Z]")) {
            return sortStr;
        } else {
            return "#";
        }
    }

    @Override
    public Object[] getSections() {
        return null;
    }

    public class ViewHolder{
        public TextView tv_chooseitem;
        public TextView tvLetter;

    }

}
